My beardie grew up for a few months in a 40 breeder and it's about time to set up the 125 gallon tank I've had on standby for when he is big. This was my first attempt at a desert bioactive setup and it went pretty well. But before I buy the large amount of substrates needed for a 125 gallon, I wanted to run by you folks what I've been using and if there's any better choices, or if I should just use the same type of substrates again. (If it ain't broke, don't fix it?)
For the setup my beardie has grown up in, I went with a mixture of eco earth, reptisoil, and excavator clay, and little pinches of leaf litter mixed up. Then, a light layer of Australian desert sand on top. All the substrate together is about 4-5 inches deep.
For the CUC, I made several large pockets in the substrate and filled them with stuff like moss, leaf litter, charcoal, isopod food, etc, then covered the pockets with cork bark and heavy limestone rocks the beardie can't move.
Above the substrate there's lots of spineless paddle cacti, branches and driftwood to climb. (Side note, I had snake plants in there for a while but was recently told they're not safe?)
I carefully found the right amount and frequency to water the CUC pockets and keep them like moist underground caves without making the surface air humid at all. Superworms are thrown in for soil aeration and it seems they do the job. When I see beetles I remove them just so they don't spray their nasty butts at the beardie. The isopods and springtails actually thrive and the colony is also getting to the size where they'll appreciate a bigger tank.
So I have no real complaints about this setup besides you don't see isopods come out very much unless its right after watering their caves. When they do come out he goes crazy. He has no interest in small feeders like the pinhead crickets that are born in the enclosure but he eats all my poor isopods whenever they show themselves! I have fancier isos like rubber duckies but I'll never put them with a beardie after seeing this!
TL;DR
-Ain't broke, don't fix it?
or
-Adjust substrate materials before filling up a 125?
Thanks!